I breed roaches to feed my leopard geckos and bearded dragon, not the typical pest roach but an exotic species that can't climb, fly, and doesn't stink. It's a much better alternative to store bought feeder crickets. Crickets die easily, stink, chrip, jump, and are such a pain. The roaches I breed (Blaptica dubia, or orange spotted roach) get to around 2 1/2 inches and I have around 1,000 in my colony. I find them pretty cool